USB-AV USB Power Current Voltage Tester - Translucent Blue + Silver

Simple
and practical; Small size, convenient to carry, no external power and other
accessory equipment needed, plug and play; Can detect any USB output of power
supply, charger, computer, car charger and mobile power, easy to measure out
no-load voltage, loading voltage and devices working current of USB output,
and to judge whether the performance of the charger and charging cable meet
the requirements; Simple to operate; Suitable for 3~7.5V / 0~2.5A, 3 digits
digital USB voltage and current alternate display, the result clear, great
for factory, laboratory and normal users.